D.C. Code§ 22-3226.08
§ 22-3226.08. Abusive telemarketing acts or practices
It is an abusive telemarketing act or practice and violation of this subchapter for a seller or telephone
solicitor to engage in the following conduct:
(1)
Cause a telephone to ring more than 15 times in an intended telephone solicitation call;
(2)
Initiate a telephone solicitation call to a consumer after the same consumer has expressly stated that
he or she does not wish to receive solicitation calls from that seller; or
(3)
Engage in telephone solicitation to a consumer's residence at any time before 8:00 a.m. and after 9:00
p.m., local time at the place of the consumer called.